49 CFR §671.51

1. (a)Each RTA must maintain the documents that set forth its RWP program; documents related to the implementation of the RWP program; and results from the procedures, processes, assessments, training, and activities specified in this part for the RWP program.
2. (b)Each RTA must maintain records of its compliance with this requirement, including records of transit worker RWP training and refresher training, for a minimum of three years after they are created.
3. (c)These documents must be made available upon request by the FTA or other Federal entity, or an SSOA having jurisdiction.